If it is desired to categorically age the rendering of temporal data by using the TimeClassBreaksAger Class as the TemporalRenderer.SymbolAger Property, there should be 2 or more TimeClassBreakInfo Classes (meaning temporal classification or grouping) to delineate the aging symbology. If aging temporal data is not needed use the TemporalRenderer.ObservationRenderer and do not set the TemporalRenderer.SymbolAger.

When a TimeClassBreaksAger object is created the ObservableCollection (Of TimeClassBreakInfo) object is also created that is accessible from the TimeClasses Property. Although the TimeClasses Property is ReadOnly, meaning you can only get the ObservableCollection (Of TimeClassBreakInfo) object, you can use its Members to like: Add, Clear, Remove, etc. to define how the TimeClassBreaksAger behaves.

To see a full example of how to set and use the TimeClasses Property review the TimeClassBreaksAger Class documentation.